18. Raiganj

Indian National Congress held the seat; the winning margin held roughly steady from 1.2% to 1.3%.

• Won on a lower shareIts own vote share fell 6.6% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 48.0% between them, down from 61.2% — the field split more ways.

Written from the constituency figures by a fixed set of rules — no language model.